Pump.



"UNITED STATES ,ATENT OFFICE.

CARL G. NYBERG, OF WORCESTER, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 716,090, dated December 16, 1902.

Application filed April 19, 1902'.

To all whom it may concern:

Be it known that I, CARL G. NYBERG, a citizen of the United States, and a resident of Worcester, in the county of Worcester and State of Massachusetts, have invented certain valve therein and a reversible valve-seat in the lower end of said pump having also a valve therein, thedevice being so constructed as to permit the said valve-seats and their valves to be reversed in' changing the pump from a force to a lift pump, and vice versa, for the purpose of removing obstructions in water, sewer, or drain pipes, as above doscribed. This is very essential, as it has been found that certain obstructions or accumulations in pipes will sometimes yield and be caused to be dislodged more readily by pressure than by suction, and vice versa. If such obstructions cannot be dislodged by pressure, they may be dislodged by suction, and this can only be ascertained by trial first with one kind of .pump and then by another kind, which would require the use of two kinds of pumps-namely, a lift and a force pump. I simplify this operation by the use of a single pump, which can be changed from a forcepump to alift-pump, as occasions may require, simply by reversing the positions of the valveseats and their valves, as will be hereinafter 40, more fully described, reference being had to the accompanying drawings, wherein-- Figure 1 is a top plan view of the invention. Fig. 2 is a longitudinal section on the line 2 2 in Fig. 1, showing the valves in position when using the device as a suction or lift pump. Fig. 3 is 'a similar longitudinal section showing the valves in position when using the device as 'a force-pump and showing its lower end temporarily connected by a flexible fitting to the soil discharge-pipe of a water-closet bowl, and Fig. 4 is a detail bot- Serial No- 103,681. (No model.)

tom plan view of such flexible water-closetbowl fitting.

Similar letters refer to similar parts wherever they occur on the difierent parts of the drawings.

In the drawings, A represents a pump-cylinder of any suitable size provided with a closed bottom B and an external lower flange O, as shown in Figs. 1, 2, and 3.

To the under side of the flange C is secured a rubber packing-ring D for the purpose of establishing an air and water tight connection between the lower end of the pump and the sink, washbowl, bath-tub, &c., from the discharge-pipes of which obstructions are to be removed.

E is the centrally-perforated cap at the upper end of the pump-cylinder, as usual.

F is the piston-rod, to the lower end of which is secured in a suitable manner the centrallyperforated piston G, which may be moved longitudinally in the cylinder A by taking hold on the piston-rod handle H, or, if so desired, the said piston may be operated by a lever or other well-known pump -actuating device, as may be most practical or convenient.

g in Figs. 2 and 3 is aleather or other suitable piston-packing on the piston G,as is common in devices of this kind.

The central perforation in the piston G is interiorly screw-threaded for the reception of an exteriorly-screw-threaded tubular valveseat sleeve I, in which is guided the valvestem is of the valve K, as shown in Figs. 2 and 3.

k k are stop projections at the end of the valve-stem'to prevent the valve from moving out ofthe valve-sleeve 1 during the operation of the pump.

In the bottom B of the pump-cylinder is a central screw-threaded perforation'for the reception ofan exteriorly-screw-threaded tubular valve-seat sleeve L, in which is guided the valve-stem m of the valve M, as shown in Figs. 2 and 3.

'm' m are stop projections at the end of the valve-stem to prevent the valve from moving out of the valve-sleeve L during the operation of the pump.

When it is desired to use the pump as a lift- .operation.

pump, the valve-sleeves I L andtheir valves K M are arranged in the positions shown in Fig. 2. When it is desired to use the pump as a force-pump, the positions .of the valvesleeves and valves are reversed, as shown in Fig. 3, and this is accomplished simply by unscrewing said valve-sleeves and placing them in a reversed position, as shown, respectively, in said Figs. 2 and 3.

In Fig; 2 N represents a kitchen'sink provided, as usual, with a discharge-cup N and discharge-pipe N, as is common'in sinks.

To the lower end'of the pump-cylinder A is connected a valve or cutoff 0, provided with a stop-cock O, as shown in Figs. 1 and 2. P in said figures represents a flexible pipe connected to said cut-off and adapted to be con-- nected to any suitable source of pressure for the purpose of forcing a supply of water into the lower portion of the pump previous to commencing the pumping operation. After the pump has been filled with water the cock 0 is closed before commencing the pumping not readily obtainable, the pump may be filled by removing the' cover Eand water poured in at the upper end of the pump-cylinder A.

In practice I prefer to provide the upper end of the pump-cylinder A with a deliveryspout A, to which may be attached atlexible pipe A", so as to discharge the matter pumped up from the sink-pipe, &c., into a bucket or other suitable receptacle, as maybe most convenient.

In using the pump on a sink or other similar device the pump may be temporarily se-. cured in position by means of clamps Q Q and screws q q, as shown in Figs. 1 and 2.

In Fig. 3 b represents the lower open end of a water-closet bowl, and if it is desired to clean the soil-pipe connected to said bowl I make use of a preferably tapering flexible metal tube or fitting T, which in practice I provide with an exterior rubber or leather lining-t, as shown in Figs. 3and 4. Such fitting may be secured in a suitable manner to the lower end of the pump when in use. The lower end of such'fitting is adapted to be inserted in the lower portion of the water-closet I bowl, and, beingflexible, it will conform to the shape of the, lower end of such watercloset bowl, so as to make a'close and airtightconn'ection between the fitting and bowl when using the device for removing obstructions in the 'water-closet-bowl soil-pipe.

In using th device for the removal of obstructions in discharge pipes from sinks, washbowls, water-closet bowls, &c., the lower end of the pump is held or secured air-tight inposition to such sinks or bowls in a manner as above described. The device can then be used as a'lift-pulnp, as shown in Fig. 2, or

Where water under pressure is Throughout the description'I have em- I ployed the terms lift-pump and forcepump to make it plain that at one time the pump may operate by suction to raise or withdraw the obstruction from the waste-pipe or may be used as a plunger or pressure-pump to force the obstruction down and out of the waste-pipe into the sewer. The two terms, therefore, are used in a relative sense only and not as being descriptive of any particular construction of pump.

What I wish to secure by Letters Patent and claim is- 1. A convertible pump comprising a pumpbarrel provided at its bottom with means for connecting said barrel air-tight with a wastepipe, a reciprocating piston arranged in the barrel, reversible val ve-seats fitted in the bottom of the barrel and in the piston, and valves and for the purpose specified.

2. A convertible pump, comprisinga pumpbarrel provided at its bottomwith means for connecting said barrel air-tight with a wastepipe, a reciprocating piston arranged in the barrel, tubular threaded valve-seats reversibly fitted in the piston and the bottom of the barrel, and valve-stems loosely fitted in said seats, each of said stems being provided on one side of the seatwith a valve adapted to close against said seat, and at its opposite end with projections arranged to engage the other side of the seat and limit the opening movement of the valve, substantially as and for the purpose specified. 3. A convertible pump, comprisinga pump-J barrel provided'at'its bottom with means connecting said barrel air-tight with a wastepipe, a reciprocating piston arranged in the barrel, reversible valve -seats fitted in the bottom of the barrel and in the piston, valves loosely fitted in said seats, a discharge-spout connected with the upper end of the barrel, and a valved water-pipe connected with the lower end of said barrel, substantially as and for the purpose specified.

In testimony whereof I have affixed my'signature in presence of two witnesses.

CARL G. NYBERG.

Witnesses:

ALBAN Anemia, 'LAURI-TZ' N. MoLLER.

IIO 

